LF
Fullrange
2"
20NFR
Code: 20NFRX4-345A
Full-Range/2inch/Neo/Paper/10W/4ohm
Key Features
- Very compact and affordable design
- Lightweight cone assembly
Quick Specs
Impedance
4 Ω
Program Power
20 W
Sensitivity
83.03 dB
Fs
185.00 Hz
Magnet
Neodymium
Voice Coil
19 mm
Design Notes
20NFR was designed for applications where true full-range frequency response from one driver is required. From low to up to 17kHz, this driver truly delivers that. With additional DSP, the driver can be used from about 60Hz up.
We have developed very lightweight foam surround material. This material is our preference anywhere where we are designing larger cone excursions, yet lightweight piston is required. It delivers excellent acoustical properties without the mass penalties.
The magnetic circuit was designed around neodymium slug magnets, with u-cup style steel. The circuit delivers very high performance in very small and lightweight form factor.
We have developed very lightweight foam surround material. This material is our preference anywhere where we are designing larger cone excursions, yet lightweight piston is required. It delivers excellent acoustical properties without the mass penalties.
The magnetic circuit was designed around neodymium slug magnets, with u-cup style steel. The circuit delivers very high performance in very small and lightweight form factor.
Specifications
General Specs
Nominal Diameter
2"
Rated Impedance
4 Ohm
Magnet
Neodymium
Basket Material
Steel
Power Handling
AES Power
10 W
Continuous Power
20 W
Peak Power
40 W
Voice Coil
Diameter
19 mm
Former
kapton
Winding Height
8.5 mm
T/S Parameters
Resonant Frequency (Fs)
185.00 Hz
Re
3.60 \u2126
Qes
0.540
Qms
10.30
Qts
0.520
Vas
0.09 liters
Sd
11.34 cm\u00B2
Mms
1.37 grams
Rms
0.15
Cms
0.5400
Bl
3.24 T\u00B7m
Le
0.080 mH
Sensitivity
83.03 dB
Design Details
Surround Material
Foam
Cone/Dome Material
Paper GF
Spider
Nomex
T-Plate
2.5 mm
Xmax (peak)
3 mm
Xmech
5.5 mm
Overall Diameter
48.00 mm
Bolt Circle Diameter
56.00 mm
Baffle Cutout Dia.
42.90 mm
Mounting Holes
4
Depth (flange to rear)
29.00 mm
Net Weight
0.08 kg
Ordering Codes
Product Code
20NFRX4-345A
Downloads
Frequency Response & Impedance
2D Drawing
Enclosure Recommendations
Recommended enclosure alignments (sealed): - 0.05 liters (Qtc 0.85): compact, punchy character; system resonance approx. 310 Hz - 0.11 liters (Qtc 0.707): maximally flat Butterworth response (recommended); system resonance approx. 249 Hz - 0.27 liters (Qtc 0.6): extended response, smooth gradual rolloff; system resonance approx. 214 Hz
Frequently Asked Questions
- - Very compact and affordable design
- - Lightweight cone assembly
Recommended enclosure alignments (sealed): - 0.05 liters (Qtc 0.85): compact, punchy character; system resonance approx. 310 Hz - 0.11 liters (Qtc 0.707): maximally flat Butterworth response (recommended); system resonance approx. 249 Hz - 0.27 liters (Qtc 0.6): extended response, smooth gradual rolloff; system resonance approx. 214 Hz
TV sets, soundbars, column speaker arrays, small portable speakers, near-field consumer and commercial audio...
AES Power: 10 W,
Continuous: 20 W,
Peak: 40 W.
Sensitivity: 83.03 dB (1W/1m).
